28366327277 has 4 divisors (see below), whose sum is σ = 28513303260. Its totient is φ = 28219351296.

The previous prime is 28366327217. The next prime is 28366327291. The reversal of 28366327277 is 77272366382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9500205961 + 18866121316 = 97469^2 + 137354^2 .

It is a cyclic number.

It is not a de Polignac number, because 28366327277 - 2¹⁰ = 28366326253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28366327217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73487702 + ... + 73488087.

It is an arithmetic number, because the mean of its divisors is an integer number (7128325815).

Almost surely, 2^28366327277 is an apocalyptic number.

It is an amenable number.

28366327277 is a deficient number, since it is larger than the sum of its proper divisors (146975983).

28366327277 is a wasteful number, since it uses less digits than its factorization.

28366327277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146975982.

The product of its digits is 7112448, while the sum is 53.

The spelling of 28366327277 in words is "twenty-eight billion, three hundred sixty-six million, three hundred twenty-seven thousand, two hundred seventy-seven".